Analysis
- max time kernel
121s - max time network
127s - platform
windows7_x64 - resource
win7-20240221-en - resource tags
- submitted
09/06/2024, 01:17
General
- Target 3bbead075c8303cfd85cb1c1f056ac80f3f373e7d2e1a4c5f34866c803a36063.exe
- Size 2.5MB
- Sample240609-bncs1abd4x
- SHA256 3bbead075c8303cfd85cb1c1f056ac80f3f373e7d2e1a4c5f34866c803a36063
Malware Config
Extracted
-
stealc
Extracted
-
vidar
-
https://t.me/r8z0l
-
https://steamcommunity.com/profiles/76561199698764354
-
user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0
Signatures
- Detect Vidar Stealer 11 IoCs
- Stealc
Stealc is an infostealer written in C++.
- Vidar
Vidar is an infostealer based on Arkei stealer.
- Detect binaries embedding considerable number of MFA browser extension IDs. 5 IoCs
- Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 5 IoCs
- Detects Windows executables referencing non-Windows User-Agents 10 IoCs
- Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 5 IoCs
- Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion 10 IoCs
- Detects executables containing potential Windows Defender anti-emulation checks 10 IoCs
- Downloads MZ/PE file
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 2 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Suspicious use of SetThreadContext 1 IoCs
- Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.
- Modifies system certificate store 2 TTPs 3 IoCs
- Suspicious behavior: EnumeratesProcesses 1 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\3bbead075c8303cfd85cb1c1f056ac80f3f373e7d2e1a4c5f34866c803a36063.exe"C:\Users\Admin\AppData\Local\Temp\3bbead075c8303cfd85cb1c1f056ac80f3f373e7d2e1a4c5f34866c803a36063.exe"1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat9ECF.tmpC:\Users\Admin\AppData\Local\Temp\kat9ECF.tmp2⤵
- Executes dropped EXE
- Checks processor information in registry
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
94308059B57B3142E455B38A6EB92015
TarAB82.tmp
kat9ECF.tmp
memory/2648-0-0x0000000000320000-0x0000000000321000-memory.dmp
memory/2648-2-0x0000000003010000-0x0000000003173000-memory.dmp
memory/2648-21-0x0000000000400000-0x000000000067A000-memory.dmp
memory/2864-13-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2864-9-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2864-17-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2864-15-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2864-24-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2864-11-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2864-23-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2864-19-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2864-177-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2864-198-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2864-221-0x0000000024A30000-0x0000000024C8F000-memory.dmp
memory/2864-235-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2864-256-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2864-257-0x0000000000400000-0x0000000000648000-memory.dmp